Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Today's Puzzle

21 May 2013   #91

Microsoft Community Contributor Award Recipient

Windows 8.1 Pro x64

Quote   Quote: Originally Posted by Kari View Post
Quote   Quote: Originally Posted by tom982 View Post
And the last four

Tom, the last one is wrong: (2*0+1+3)! = 4! = 24

7, 8 and 9 are correct.
Oh crap In a moment of madness, I thought 4! = 4+3+2+1.

My System SpecsSystem Spec
21 May 2013   #92


My System SpecsSystem Spec
21 May 2013   #93
Microsoft MVP

Windows 7 Ultimate X64 SP1

You guys are using notations beyond me.
My System SpecsSystem Spec

21 May 2013   #94


Britton, the ! in math is a factorial.

For example:
4! = fact(4) = 1*2*3*4=24
7! = fact(7) = 1*2*3*4*5*6*7=5040

Funny enough, don't ask me why, the 0! = fact(0) = 1. Trying to find an explanation I just Googled "Math 0!" and got this page: Math Forum: Ask Dr. Math FAQ: 0! = 1
My System SpecsSystem Spec
21 May 2013   #95
Microsoft MVP

Windows 7 Ultimate X64 SP1

Thanks Kari! In Colin's solution what does the 1) mean?
My System SpecsSystem Spec
21 May 2013   #96


Quote   Quote: Originally Posted by Britton30 View Post
Thanks Kari! In Colin's solution what does the 1) mean?
You mean this:
Quote   Quote: Originally Posted by Golden View Post
5 = ((2 + 0) x 1) + 3
You count first the formula within the first (blue) parenthesis 2 + 0 which gives 2, then using that sum you solve the formula within next (green) parenthesis using the sum from first parenthesis as a factor, 2 * 1 = 2.

Without (double) parenthesis it would be 2 + 0 x 1 + 3 = 5, so although the parenthesis are correct in this formula from Colin, they are this time unnecessary.

An example where using parenthesis would give a different outcome:
2 * 0 + 1 + 3 = 4
2 * (0 + 1) + 3 = 5
My System SpecsSystem Spec
21 May 2013   #97
Microsoft MVP

Windows 7 Ultimate X64 SP1

Ahh, I missed the first double parenthesis.
My System SpecsSystem Spec
21 May 2013   #98


No special skills needed, just addition:

A three by three table:
Today's Puzzle-3x3.png
And 9 prime numbers: 7, 37, 43, 67, 73, 79, 103, 109, 139

Place the given prime numbers so that each horizontal, vertical and diagonal line gives the exactly same sum. For instance if you think that the first row should be 73 + 103 + 7 = 183, then the two other horizontal lines, all three vertical lines and both diagonal lines should also give 183.

If this is too difficult, I will tell what the sum of all 8 lines should be .

My System SpecsSystem Spec
21 May 2013   #99


First hint: Each line gives a sum of 219.
My System SpecsSystem Spec
21 May 2013   #100

Windows 7 Home Premium SP1 64bit

 103    7   109
  79   73    67
  37  139    43
How did I arrive at the solution?
I don't know if this works in every case, but I used some logic as follows.
  • given: 3,37,43,67,73,79,103,109,139
  • the sum of the numbers is 657
  • for the sum of each row or column to be equal, the sum has to be 657/3=219
  • because there are 9 squares, I decided to divide the total by 9 and see what comes up: 657/9=73
  • looking at the sequence, I found 73 to be the median --> why not try that in the center square?
  • so 219-73=146 --> is there a pattern?
  • the sums of the outer pair, second from outer pair, etc. all are 146
  • this provides the following pairs: 7,139; 37,109; 43,103; 67,79
  • because a center out perspective is working so far, let's examine using the two center pairs above (37,109; 43,103) for the diagonals
  • placing the pairs in diagonal opposite corners provides the same sums as calculatd earlier for the rows and columns
  • remaining squares are just a matter of simple math to provide a column or row sum of 219
  • magically, all of these solutions used one of the remaining numbers given for the puzzle
I was posting my solution while you were providing the hint. I did not peak.
My System SpecsSystem Spec

Thread Tools

Similar help and support threads
Thread Forum
Puzzle By This
Was watching my computer and the gadget show high CPU usage. Click on it expecting many one of my programs was running in the background but noticed the following screen shot. Does anyone know what DSD_5996 is?
General Discussion
Partitions puzzle
Here's a few screenshots all from the same machine. Diskpart shows: Disk Management shows:
Installation & Setup
Forum puzzle
I was trying out how a picture as a link would work. I tried with 2 identical strings. The first one would not work and the second worked. Go figure - as far as I can see they are exactly the same. Does anybody see a difference. If you copy/paste them from the script into a Notepad or Wordpad, they...
Chillout Room
Monitor Puzzle
Re: 7 o/s. During running of a system test, a pop-up appeared saying the following; Current input timing is not supported by the monitor display. Change input timing to 1600x900 60Hz. Because I was stuck and it wouldn't go any further, no matter what buttons I pushed on my monitor, I shut it down...
Graphic Cards
Network puzzle
Can anybody help before I become even more hairless! I've been trying to sort out this for many hours. I have - a recently purchased Windows 7 Pro Lenovo T420 laptop which is wireless an XP Pro IBM T43 wireless laptop a Dell XP Home desktop connected to my wireless router by Ethernet...
Network & Sharing

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 10:50.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App